. . MEDICAL: DISESASES: EBOLA VIRUS: How Doctors Test for Ebola . . How Doctors Test for Ebola By Tanya Lewis Livescience.com October 6, 2014, 3:17 PM CBS News http://www.cbsnews.com/news/how-doctors-test-for-ebola/ . .Health officials are now monitoring 50 people in Texas for signs of Ebola via twice-daily temperature checks, and in recent days, there have been reports of people in other areas of the country -- including Washington, D.C. -- suspected of having the virus, although most have been ruled out.
.But why can't all these people just be tested for Ebola as soon as possible?
.Ebola is difficult to diagnose when a person is first infected because the early symptoms, such as fever, are also symptoms of other diseases, such as malaria and typhoid fever.
."The symptoms are extremely nonspecific in the beginning -- Ebola looks like almost anything," said Dr. Bruce Hirsch, an infectious-disease specialist at North Shore University Hospital in Manhasset, New York.
. Who could have it? .The main question doctors consider is whether the person has been in one of the countries in West Africa experiencing the current Ebola outbreak (Guinea, Sierra Leone or Liberia) within the last 21 days, which is the incubation period of the virus, Hirsch told Live Science. Or, whether that person has been exposed to someone has been one of those places, he added.
. snip . Tests for Ebola .A number of tests can be used to diagnose Ebola within a few days of the onset of symptoms, which can detect the virus's genetic material or the presence of antibodies against the pathogen.
.The most accurate of these is likely the polymerase chain reaction (PCR) test, a technique that looks for genetic material from the virus and creates enough copies of it that it can be detected, Hirsch said. "PCR is a really definitive test," Hirsch said. It can pick up very small amounts of the virus.
.However, this test can be negative during the first three days an infected person has symptoms, said Dr. Sandro Cinti, an infectious-disease specialist at the University of Michigan Hospital System/Ann Arbor VA Health System.
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